Question

if x+y=12 and xy =27, find the value of 5x³ +y³.

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Answer 1

Answer:

Step-by-step explanation:

here is your answer

(x+y)^3=x^3+3x^2y+3xy^2+y^3

= x^3+y^3+3xy(x+y)

x^3+y^3=(x+y)^3-3xy(x+y)

= (12)^3-3(27)(12)

=1728-972

x^3+y^3=756

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